`trim()` isn't supported in older browsers. This should use `Y.Lang.trim()`.

It's not enough to split on a single space character. We'll need to split on any amount of any whitespace character, so this'll have to be a regex: `/\s+/`

`every()` isn't supported in older browsers either, and is probably not fast enough in newer browsers given that this is a performance hotspot. This should probably become a `for` loop.